OS
Onestep Technologies
Online Free Chlorine Monitoring
Pilot Product in DevelopmentOnline Free Chlorine24-Month Reagent Stability

Low-maintenance online free-chlorine monitoring

Onestep Technologies is developing an online free-chlorine monitor for water systems that need continuous residual-chlorine data but cannot support frequent reagent replacement, probe maintenance, or manual testing.

The monitor is based on stabilized single-reagent optical chemistry with up to 24-month room-temperature stability, protected by U.S. patent rights. It is being designed to combine controlled sample handling, optical readout, embedded control, fluidics, and digital output to turn free-chlorine residual from manual spot checks into a low-maintenance, machine-readable data stream.

The goal is not simply to produce another chlorine number. The goal is to create continuous chlorine data that operators, alarms, and future automated water-management systems can trust.

Discuss Pilot or Technical EvaluationTechnical Resources

Pilot product in development

Core chemistry developed; integrated online monitor under development for pilot and technical evaluation.

Core chemistryDeveloped
Reagent stabilityUp to 24 months
Monitor integrationIn progress
Pilot discussionsOpen
Onestep Technologies low-maintenance online free-chlorine monitoring for distributed water systems

Product concept render. Core stabilized reagent chemistry has been developed; integrated online monitor is in development.

Core chemistry
Stabilized single-reagent optical chemistry for free-chlorine monitoring has been developed.
Reagent stability
Designed for up to 24-month room-temperature stability.
Pilot product
Integration into a field-testable online monitor is in progress.
The problem
Free chlorine is one of the most important operational signals in water systems, but many sites still rely on manual testing or online analyzers that require frequent reagent replacement, calibration, or service.
Our approach
We start at the chemistry layer: stabilized single-reagent optical free-chlorine chemistry designed to reduce reagent burden and operator attention.
Why now
Remote operations, water reuse, distributed treatment, and AI-assisted water management all require reliable real-time field data, not occasional manual readings.

Built for maintenance-constrained water systems

Existing online chlorine systems can work well in staffed and well-maintained environments. But small, remote, reuse, building-scale, and distributed sites often face a different problem: the measurement must remain trustworthy with less frequent operator attention.

Our core chemistry is designed to reduce one of the main operating burdens of reagent-based online chlorine monitoring: frequent reagent replacement. The next step is integrating this chemistry into a field-testable monitor with controlled sample handling, compact optical readout, embedded control, fluidics, and digital output.

Technical direction
The monitor is being designed around stabilized reagent chemistry, controlled sample handling, compact optical readout, embedded control, fluidics, and digital output for integration into operator workflows.

Intended applications

The first pilot use cases are water systems where continuous free-chlorine data is valuable, but frequent reagent replacement, probe maintenance, or manual spot checks are operationally difficult.

Small and remote drinking-water systems
Water reuse and decentralized treatment systems
Building-scale water systems
Industrial water and recirculation systems
Emergency and mobile water-treatment units
OEM and instrumentation partners
For operators
A lower-maintenance path to continuous free-chlorine visibility at sites where manual testing or frequent service visits are difficult.
For automation
A more practical chlorine data stream for alarms, remote operations, automated treatment workflows, and future AI-assisted water management.
For partners
A stabilized chlorine-sensing chemistry layer that may support OEM integration, module development, or technical evaluation with instrumentation partners.

Pilot and partnership inquiries

We are open to pilot discussions with utilities, reuse operators, industrial water users, emergency water providers, and instrumentation partners interested in low-maintenance online free-chlorine monitoring.

For pilot deployment, OEM integration, or technical evaluation, contact Onestep Technologies.

Discuss Pilot or Technical Evaluation